Publication
Measurement of the prompt $J/\psi$ and $\psi$(2S) polarizations in $pp$ collisions at $\sqrt{s}$ = 7 TeV
| dc.contributor.author | CMS collaboration (2219 authors) | |
| dc.contributor.author | Hollar, Jonathan | |
| dc.contributor.author | Nayak, Aruna | |
| dc.contributor.author | Calpas, Betty | |
| dc.contributor.author | Almeida, Nuno | |
| dc.contributor.author | Bargassa, Pedrame | |
| dc.contributor.author | Beirão Da Cruz E Silva, Cristóvão | |
| dc.contributor.author | Faccioli, Pietro | |
| dc.contributor.author | Ferreira Parracho, Pedro Guilherme | |
| dc.contributor.author | Gallinaro, Michele | |
| dc.contributor.author | Nguyen, Federico | |
| dc.contributor.author | Rodrigues Antunes, Joao | |
| dc.contributor.author | Seixas, Joao | |
| dc.contributor.author | Varela, Joao | |
| dc.contributor.author | Vischia, Pietro | |
| dc.contributor.author | Lloret Iglesias, Lara | |
| dc.contributor.author | David Tinoco Mendes, Andre | |
| dc.contributor.author | Musella, Pasquale | |
| dc.contributor.author | Silva, Pedro | |
| dc.contributor.author | Pela, Joao | |
| dc.contributor.author | Leonardo, Nuno | |
| dc.date.accessioned | 2019-02-03T23:14:19Z | |
| dc.date.available | 2019-02-03T23:14:19Z | |
| dc.date.issued | 2013-10-29 | |
| dc.date.updated | 2019-02-03T23:14:18Z | |
| dc.description.abstract | The polarizations of prompt J/psi and psi(2S) mesons are measured in proton-proton collisions at sqrt(s) = 7 TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 inverse femtobarns. The prompt J/psi and psi(2S) polarization parameters lambda[theta], lambda[phi], and lambda[theta,phi], as well as the frame-invariant quantity lambda(tilde), are measured from the dimuon decay angular distributions in three different polarization frames. The J/psi results are obtained in the transverse momentum range 14 < pt < 70 GeV, in the rapidity intervals abs(y) < 0.6 and 0.6 < abs(y) < 1.2. The corresponding psi(2S) results cover 14 < pt < 50 GeV and include a third rapidity bin, 1.2 < abs(y) < 1.5. No evidence of large transverse or longitudinal polarizations is seen in these kinematic regions, which extend much beyond those previously explored. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B727 (2013) 381-402; DOI 10.1016/j.physletb.2013.10.055 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2013.10.055 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26453 | |
| dc.language.iso | eng | |
| dc.title | Measurement of the prompt $J/\psi$ and $\psi$(2S) polarizations in $pp$ collisions at $\sqrt{s}$ = 7 TeV | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |